1·Surplus snowfall is essential for a glacier to develop.
过剩的降雪是冰川形成的必要条件。
2·Its chances for survival are best if it turns white about the time of the first snowfall.
如果它在第一次降雪时就变成白色，生存几率会是最高的。
3·The cave-making recipe calls for a steady emission of volcanic gas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer.
洞穴的形成需要火山气体和热量的稳定释放，海拔高到足以防止每年的大量降雪在夏季融化。
4·With further melting, refreezing, and increased weight from newer snowfall above, the snow reaches a granular recrystallized stage intermediate between flakes and ice known as firn.
随着进一步的融化、再结冰，以及上方新的降雪增加的重量，这些雪变成再次结晶阶段的颗粒状中间物，介于小薄片与冰块之间，被称作万年雪。
5·By studying these components, scientists have obtained a detailed archive of many aspects of climate, including air temperatures, snowfall, and concentrations of greenhouses gases in the atmosphere.
通过研究这些成分，科学家们获得了气候的许多方面的详细档案，包括空气温度、降雪和大气中温室气体的浓度。
1·On 3 January last year, the average snowfall in 20 hours can reach 11 millimeters.
去年一月3日，20小时的平均降雪量为11毫米。
2·The average snowfall here is 10cm a year.
这里年平均降雪量为10厘米。
3·Central China. And it was the big snowfall?
在中国中部，那里的降雪量很大吗？
4·The U. S. West Coast is experiencing record-breaking rain and snowfall, with more storms on the way later this week.
美国西海岸正经历破纪录的降雨和降雪量，本周后期会有更多暴雨或暴雪。
5·Therefore, the position and intensity of the high and low-level jet can be used for the short-range forecast indicator of the snowfall and falling area.
高低空急流的位置及强度可作为降雪量和大-暴雪落区的短期预报指标。